Telephone-support.



ROY MORRIS ALLEN, OF EAST ORANGE, NEVI ELECTRIC COMPANY, 0F NEW YORK, N. Y.,

JERSEY. AssIGNon 'ro WESTERN A .CORPORATION or ILLINOIS.

TELEPHONELSUPPORT.

Specification of Letters Patent.

.Patented Feb. 24, 19.14.

Application filed July 18, 1911. Serial No. 639,101.

lT he objects of the invention are to sim plit'pv the apparatus, to increase its durability. and to reduce the cost of manufacture.

t 'lhe apparatus employs` a radial arm supported at one end, its free terminal moving' in a curvilinear path, like the arc of a circle;

the telephone or other structnr,l is located it, the free end of this arm, and when moved as described is maintained in a substantially unvarying angular position with respect to a normal plane, such as a horizontal plane. The arm referred to is composed of two parallel meu'lbers sliding on each other, or rel. '(:ipi'ocatliw': near the terminals their adjacent contact surfaces are toothed .and there are two toothed disks between the two members. one at each end of the arm; these toothed disks mesh with the cogged members ot' the arm. There is a strap or series of straps, or a casing, uniting the .two members constituting the described arm; this holds the two members in reciprocating position with respect. to each other. One toothed disk is fixed on a stationary support, the

other .toothed disk is supported by the two members constituting the arm and, in tur-n,

supports the telephone or other similar structure. A -sprmg is pro-vided Ato nen .tralize the action of gravity on the arm, so that it may occupy any radial position'until positively mover.

The accompanying drawings illustrate the invention. l

Figure 1 is a side elevation of the device with one oi the plates at the upper end of the arm broken away to show the pinion in mesh with the racks and the spring casing removed from the bracket at thc lower ond of the arm to show one of the counter-balancing springs. the lower supporting'plates Wlth the arm and 'using broken away to show the springs. i the other.

Fig. 2 is a plan view of` Fig. 3 is a section' on line 3 3 of Fi l. Fig. 4- shows ithe racks of the arm mesin with the stationary pinion at the lower en thereof, and` Fig. 5 is a section in perspective through they plates at the lower end of lthe. arm, showing the manner of supporting the pinion thereon.

The arm n. is composed of two slidably related members 10 and 11 held in engagement by lneanspt' the straps 12 which are secured to the member 11 by means of the rivets 13. These straps have loops or eyes 14 through which the flexible conductor 15 passes from a point. in the supporting base IZ; to the transmitter t at. the free end of the arm a. The adjacent portions of the bars 10 and 'll at each end thereof are cut away 'and provided with the racks 16. Positioned between the opposing racks 16 at the opposite ends of the arm o are the pinions c and 1I, respectively. l

Rotatably secured to the base member b,

as at 20, is a bracket consisting of the spaced parallel plates (e. Each of these plates is provided with an aperture corresponding in contour to the pinion c and in which the said pinion is non-rotatably mounted. The pinion r] is supported between the plates g in much the same manner as pinion c is Secured to tbe plate c, with the exception that only one plate f/ receives a toothed ortion ot the pinion, as clearly shown in lbig. 3. Ilxtcnding through the pinion c is a pin 40,

the projecting ends of which are loosely snrrounded by collars 8. Each ,of the plates e is provided with un arcuate slot 27 through which projects a pin E26 carried by the arm ll. This slot and pin limits the movement of the arm a. Euch of the plates e `is provided with a series of openings 25. `Coiled about: each of the collars 8 is a spiing 23 having one end secured to the pin 26 and thc other end turned at an angle and inserted in one of the openings 25. lhe springs 23 are inclosod by the casing caps 2l und 22, which are retained in )osition b v means of the screws t) inserted therethrough into the ends oi'V the pin 40. .Pivotally secured to the plates r/ is a bracket L to which the telcphonol standard may 'ic secured in any dcsircd manner.

lvVhen the telepho is moved upwardly or downwardly, theba'rs'i l0 and 11 slide one on On the downward movement the,

Civ.

bar 1,1 moves outwardlyuand the bar moves inwardly, and on the upward movement the reverse takes place., This movement is due to the pinion c being fixed to the plates e and operatesto always maintain the, tele phone standard in a position perpendicular to tle supporting surface for' the base mem- The force which must be eigerted yon the arm a to counter-balance the action of gravity varies from a minimum when the arm is in its uppermost position, to a maximum when the arm is horiaontal. As the arm is moved upwardly, the pin 26 ap roaches the pinion c, thus decreasing the efiactive leverage of the vspring 23. At the same time the opposite ends ofthe springs approach each other, whereby the tension ofthe spring is diminished. These two factors cooperate to increase or diminish the amount of compensating action of the springs as the arm is raised or llowered.A Thus by placing the angular end of the spring 23 in different apertures 25, the tension of thespring `can be so adjusted as to accurately counterbalance the weight of the arm a in whatever position it may be placed, so that said arm will remain in any angular position to which it may be moved.

I claim 1. The combination with a 'vertically movable member to be supported in unvarying relation to a normal plane, of a base and a pair of parallel slida ly related supporting arms, racks carried by each of saidA arms ad-V jacent to the ends thereof, a pair of devices between said arms intermediate the' ends thereof, operatively engaging said racks, one 1 of said devices being lixed to the base and the other of said devices' being secured to Athe movable member.

2. The combination with a vertically movable member to be supported in unva'rying relation to anormal plane, of a base and a pair of parallel slidably related supporting arms having opposing recesses at each end thereof, a pair of devices between said arms,

4said devices having lugs engaging said recesses, one of said devices bem fixed to the base andthe other of said devices-being secured to the movable member. f

3. In a support for maintaining a lstrucl ture in'unvarying relation to a normal plane during movement thereof in a curvilinear lpath, the comblnation of a palr of members avlng adjacent toothed surfaces, means for maintaining said members in longitudinally reciprocating relation; a pair of toothed disks engaging said toothed surfaces at each terminal of said arms, a rigid support-for one of said disks and a structure supported on the other disk.

v4:. The combination with a movable struc-y ture to be supported in unvarying relation to a normal plane, of a pair of parallel toothed members, a device uniting said members 1n sliding relation with respect to each other, a

pair of toothed disks located between'saidV members, one ateach end thereof, means for holding one of said disks rigidly, and a structure supported on the other of said disks. i

5. The combination with a movable struci ture to be supported in unvaryin relation to a normal plane, of a pair o parallel toothed members, a device uniting said mem`- bers in sliding relation with respect to each other, a pair of toothed disks located be tween said members, one at each end thereof,

means for holding one of said disks rigidly,

secured to said base, a pin projecting .from

said plate, an arm mounted for rotative and longitudinal movement relative to said pin, and means for compensating for the action of gravity on said arm, consisting of a spring havingone end fixed to said arm and the otherend fixed to said plate.

7. In a telephone support, avbase, a plate secured to said base, a pin project-ing from said plate', an arm mounted for. rotative and longitudinal-movement relative to said pin, andY means for compensating for the action of gravity on said arm, said means consisting of a spring coiled about ysaid pin, said spring having'one end fixed to said arm and the other end adjustably secured to said plate. 1

v8. In a telephone support, a base, a bracket securedtn reto, a pin carried by said bracket, an arm pivotallysupported on said pin to move in a vertical plane, a spring for compensating for the action of gravity on .said arm having one end attached to said arm and the other end to saidplate, vand means for causing longitudinal movement of said arm as it is moved upwardly, whereby the peint of attachment of said spring to said arm is` RorMoRRisiALLnN.

Witnesses: Invi'No MACDONALD, FRANK A. FLE'IsoHMaN. 

